Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 21774

Konus-Wind observation of GRB 170826A
2017-08-31T13:25:28Z (7 years ago)
Dmitry Svinkin at Ioffe Institute <>
D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik,
M. Ulanov, A. Tsvetkova, A. Lysenko, A.Kozlova, and T. Cline
on behalf of the Konus-Wind team, report:

The short-duration GRB 170826A
(Fermi GBM observation: Poolakkil et al., GCN Circ. 21715;
IPN Triangulation: Svinkin et al., GCN Circ. 21734)
triggered Konus-Wind at T0=31868.408 s UT (08:51:08.408).

The burst light curve shows a single pulse which starts
at ~T0-0.250 s and has a total duration of ~0.3 s.

As observed by Konus-Wind, the burst
had a fluence of 1.1(-0.2,+1.1)x10^-6 erg/cm2,
and a 16-ms peak flux, measured from T0-0.032 s,
of 1.1(-0.4,+1.2)x10^-5 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).

Modeling the KW 3-channel time-integrated spectrum
(from T0-0.248 s to T0+0.040 s)
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
yields alpha = -1.15(-0.26,+0.46) and Ep = 682(-261,+3960) keV.

The Konus-Wind light curve of this GRB is available at

All the quoted errors are at the 68% confidence level.
All the quoted values are preliminary.
Looking for U.S. government information and services? Visit